Function tileTextLadder

The ladder for a scene with content, richest first.

Order, and why:

1. the full texts;
2. the authored short sublabel: the author's own condensed text, so it loses nothing they did not choose to lose;
3. the sublabel cut to three, two, then one line;
4. no sublabel;
5. no numeral, which hands its band back to the label;
6. the authored short label: a title the author wrote to fit, which beats a smaller copy of the long one;
7. the label at 90% then 80% of its fitted size;
8. a label that may break inside a word, so it is clipped nowhere.

Steps that would change nothing (a short sublabel when none is authored, any sublabel step when the scene has none) are left out, so every step the renderer measures is a real change.